@media(max-width:768px)
{
    .detail{
        display: flex;
        flex-direction: column;
    }

    .topbar{
       display: none;  
    }
    .topbar_mobile{
        right: 0;
        position: absolute;
        top: 0;
        transition: all 0.5s ease-in-out;
        display: flex;
        flex-direction: column;
        background-color: #b1b2b8;
        opacity: 0.8;
        &_list{
           a{
            li{
                color: #fff;
                text-decoration: none;
                list-style: none;
            }
           }
        }
        z-index: 2;
    }

    .about_main{
        display: flex;
        flex-direction: column;
       &_aside{
        padding-bottom: 20px;
        border-right:none ;
        border-bottom: 1px solid silver;
       }
    }

}